/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlinePartyInterface.h
Create a new party
true if task was started
bool CreateParty ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & LocalUserId, const [FOnlinePartyTypeId](API\Plugins\OnlineSubsystem\FOnlinePartyTypeId) PartyTypeId, const [FPartyConfiguration](API\Plugins\OnlineSubsystem\Interfaces\FPartyConfiguration) & PartyConfig, const [FOnCreatePartyComplete](API\Plugins\OnlineSubsystem\Interfaces\FOnCreatePartyComplete) & Delegate )